Culturally Related Anxiety

I visited an organization's website, with which i have an account, just a minute ago. There I read the blog of one of the members being trained to teach the courses taught by the organization.

I haven't gone to the organization's center in California for about 2 months now but the anxiety I felt during one of my visits there is still strong that even just by looking at the blog of one of the members I've met there causes me to feel so insecure. That emotionally disturbing day was when I realized that I was the only new member who always stayed during the break with the veteran members, that I was not as knowledgeable as they were about Western cultures, that I felt uncomfortable being with other male adults, that I was not as fluent in speaking English nor as keen in listening to English conversations as they were, and that I was the only native Asian usually present at break. I felt so little, like a total outsider, at that time that I had to spend my lunch break somewhere else. 

Anyways, why am I still bothered by that experience? It's because I'm actually considering going back to the center to continue taking up the courses. I feel terrified even by that thought, and this has just been intensified by the memory of the most awful moment I had there. Nevertheless, no, I am not going to back out on attempting to continue my studies there just because of my fears and insecurities. I will humbly accept my feelings, my imperfections, and the differences and outlooks of the people I will be meeting. After all, my real purpose of attending the classes is to learn and improve myself, and not worry about pleasing other people.